Flu

Influenza, commonly known as the flu, is a contagious respiratory illness caused by influenza viruses. The flu can affect people of all ages and can lead to mild to severe symptoms. It is characterized by the sudden onset of symptoms and can result in seasonal outbreaks, often during the fall and winter months.

Key points about the flu include:

Viral Cause:

Influenza is caused by influenza viruses, specifically types A, B, and, less commonly, C. Influenza A and B viruses are responsible for seasonal flu outbreaks.

Transmission:

The flu is highly contagious and spreads through respiratory droplets when an infected person coughs, sneezes, or talks. It can also spread by touching a surface or object with the virus and then touching the face.

Symptoms:

Common symptoms of the flu include fever, chills, cough, sore throat, runny or stuffy nose, muscle or body aches, headaches, fatigue, and sometimes vomiting and diarrhea.

Seasonal Variability:

The flu is known for its seasonal variability, with peak activity typically occurring during the fall and winter months. Different strains of influenza viruses circulate each flu season.

Problems:

While most people recover from the flu without complications, it can lead to severe illness, particularly in high-risk groups such as young children, elderly individuals, pregnant women, and those with underlying health conditions.